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| система вентиляции | |||
| system of ventilation: 40 phrases in 12 subjects |
| Automobiles | 2 |
| Construction | 8 |
| Electronics | 1 |
| Firefighting and fire-control systems | 5 |
| General | 2 |
| Military | 1 |
| Mining | 9 |
| Oil / petroleum | 2 |
| Oil and gas | 1 |
| Shipbuilding | 2 |
| Technology | 5 |
| Ventilation | 2 |